Effect of Binders on the Magnetic Behavior of P/M Processed FeSiBCuNb Alloy


Article Preview

The effect of heat treatment and binder additions on the magnetic behavior of P/M(powder metallurgy) processed Fe73.5Si13.5B9Cu1Nb3 alloy has been investigated. FeSiBCuNb amorphous ribbons produced by plannar flow casting were annealed at temperatures between 480°C and 620°C for 20 to 60 minutes. The annealed specimens were milled using a pin crusher and a hammer mill. The powder was then mixed with mineral or polymer binders to press into a toroidal shape of inductor core at room temperature. Fe73.5Si13.5B9Cu1Nb3 alloy showed maximum permeability when annealed at 540°C for 40 minutes. The microstructure of the annealed ribbon has a ultra-fine α-Fe(Si) grain, ranging from 10 to 20 nm in diameter. Inductor cores produced using a glass binder showed better magnetic properties than polymers or oxide binders. The use of mineral binders in producing nanocrystalline inductor cores significantly improved magnetic properties, compared to a commercial moly-permalloy powder core.



Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi




H. J. Kim et al., "Effect of Binders on the Magnetic Behavior of P/M Processed FeSiBCuNb Alloy", Materials Science Forum, Vols. 449-452, pp. 501-504, 2004

Online since:

March 2004




[1] Y. Yoshizawa, S. Oguma, K. Yamauchi, J Appl. Phys. Vol. 64 (1988). P. 6044.

[2] M. Yagi, I. Endo, I. Otsuka, H. Yamamoto, R. Okuno, H. Koshimoto, A. Shintani. J. Magn. Magn, Mat. Vol. 215-126 (2000), pp.284-287.

[3] G. Herzer, J. Magn. Magn. Mater., Vol. 112 (1992), p.258.

[4] P. Gorria, V.M. Prida, M. Tejedor, B. Hernando, et al., Physica B, Vol. 299 (2001), p.215.